96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "charger_mt6370.h"
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#include "console.h"
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#include "driver/tcpm/mt6370.h"
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#include "driver/charger/rt946x.h"
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#include "hooks.h"
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#include "power.h"
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#include "usb_pd.h"
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#include "util.h"
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#define BAT_LEVEL_PD_LIMIT 85
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#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
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#ifndef CONFIG_BATTERY_SMART
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int board_cut_off_battery(void)
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{
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/* The cut-off procedure is recommended by Richtek. b/116682788 */
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rt946x_por_reset();
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mt6370_vconn_discharge(0);
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rt946x_cutoff_battery();
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return EC_SUCCESS;
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}
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#endif
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void mt6370_charger_profile_override(struct charge_state_data *curr)
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{
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static int previous_chg_limit_mv;
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int chg_limit_mv;
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/* Limit input (=VBUS) to 5V when soc > 85% and charge current < 1A. */
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if (!(curr->batt.flags & BATT_FLAG_BAD_CURRENT) &&
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charge_get_percent() > BAT_LEVEL_PD_LIMIT &&
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curr->batt.current < 1000) {
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chg_limit_mv = 5500;
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} else if (power_get_state() == POWER_S0) {
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/*
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* b/134227872: limit power to 5V/2A in S0 to prevent
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* overheat
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*/
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chg_limit_mv = 5500;
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} else {
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chg_limit_mv = PD_MAX_VOLTAGE_MV;
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}
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if (chg_limit_mv != previous_chg_limit_mv)
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CPRINTS("VBUS limited to %dmV", chg_limit_mv);
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previous_chg_limit_mv = chg_limit_mv;
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/* Pull down VBUS */
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if (pd_get_max_voltage() != chg_limit_mv)
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pd_set_external_voltage_limit(0, chg_limit_mv);
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/*
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* When the charger says it's done charging, even if fuel gauge says
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* SOC < BATTERY_LEVEL_NEAR_FULL, we'll overwrite SOC with
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* BATTERY_LEVEL_NEAR_FULL. So we can ensure both Chrome OS UI
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* and battery LED indicate full charge.
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*/
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if (rt946x_is_charge_done()) {
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curr->batt.state_of_charge = MAX(BATTERY_LEVEL_NEAR_FULL,
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curr->batt.state_of_charge);
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}
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}
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static void board_charge_termination(void)
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{
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static uint8_t te;
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/* Enable charge termination when we are sure battery is present. */
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if (!te && battery_is_present() == BP_YES) {
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if (!rt946x_enable_charge_termination(1))
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te = 1;
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}
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}
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DECLARE_HOOK(HOOK_BATTERY_SOC_CHANGE,
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board_charge_termination,
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HOOK_PRIO_DEFAULT);
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void board_set_charge_limit(int port, int supplier, int charge_ma,
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int max_ma, int charge_mv)
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{
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/* b/134227872: Limit input current to 2A in S0 to prevent overheat */
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if (power_get_state() == POWER_S0)
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charge_set_input_current_limit(MIN(charge_ma, 2000), charge_mv);
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else
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charge_set_input_current_limit(
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MAX(charge_ma, CONFIG_CHARGER_INPUT_CURRENT),
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charge_mv);
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}
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